Edwin eoat



E. BOAT.

FEED DRIER.

(No Model.)

Patented Apr.'1'7, 1883.

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N4 PEKERs. Huolo-Lilhogmpber. Walhmglom D C NITED STATES EDWIN BOAT, or BUFFALO,

NEW YORK, ASSIGNOR O F ONE-HALF T HARRY HAMLIN, 0F SAME PLACE.

FEED-DRIER.

SPECIFICATION forming part of Letters Patent N0. 275,858, dated April 17, 1883.

Application filed February 19, 1883. (No model.)

To all whom it may concern Be it known that I, EDWIN BOAT, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Feed-Driers; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and

to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates more particularly to certain improvements in thesugar-drier for which Letters Patent N 0.149,?)97 of the United States were granted April 7, 1874., to O. H. Hersey. The drier therein shown consists substantially of a cylinder providedwith longitudinalbuckets, and in which aseries ofsteampipes are centrally assembled within the cylinder parallel to the axis thereof and extending from one steam-head to another, steam entering the center of one head, and from thence passing through the several pipes into and through the other head.

In my present invention 1 have preferably retained substantially the entire device of Hersey, and have arranged and combined my improved construction therewith, whereby I obtain a drier much better adapted for the spe cial use for which it is intended-win, that of drying feed, or, in other words, the refuse or tailings of the manufacture of starch.

To this end my invention consists substantially in providing an outer series of steampipes, which I locate around the interior surface of the cylinder between the longitudinal buckets and in close proximity to such surface, and these steam-pipes, at or near each end of the cylinder, enter an annular steam-passage secured to the inner surface of such cylinder.

My invention further consists in connecting the two annular steam passages with the steam-heads of the central system of pipes in such a manner that the annular steam-passages and their connecting steam-pipes are supplied from one of the steam-heads and discharge their Waste and condensed steam into the other head.

I do not wish it to be understood that it is entirely essential to combine my outer system of pipes with the central system or use them in conjunction therewith, for provision could be made independently thereof for delivering and discharging the steam from the outer pipes and their connected annular passages in the event of my wishing to entirely discard the central system.

In the drawings, Figure l is avertical longi tudinal section of my improved drier, and Fig. 2 is an interior transverse sectional view taken in the line 00 x of Fig. 1.

Referring to the drawings, a is the cylinder, provided with the rims or tires 1), which rest and turn upon rollers c. It is revolved upon these rollers by means of a gear-wheel, d, operated by suitable power. Longitudinal buckets e, for lifting the feed, are riveted to the interior surface of the revolving cylinder. Two hollow steam-heads,ff, are centrally secured inside of the cylinder, at or near either end thereof, by means ofa suitable numberof brackets,f and adjusting-scrcwsf. The interior surfaces of these heads f f are perforated to admit a series of connecting-pipes, g. Steam is admitted to head f by means of a supply-pipe, h, and an exhaust-pipe, h, is fitted to drumf for conveying away the waste and condensed steam. The construction thus far described is substantially that of the Hersey drier before referred to, and 1 have arranged and combined my improvements therewith in a manner which I will now proceed to describe.

7; are two annular steam-passages, located at or near each end of the drier-cylinder a and in close proximity to the steam-heads ff. These annular passages lie against and are secured to the inner surface of the cylinder. The inner surfaces of these annular passages 7. It are perforated, as shown, to admit the series of connecting-pipes l, which lie upon or in close proximity to the interior surface of cylinder a and between the longitudinal buckets c. The annular. passage It, at the upper end of the cylinder, is connected at several points (preferably four in number) of its interior concave surface with as many points in the inner flat surface of the steam-head f by the curved pipe-connections m.

ICO

It will be observed that the pipe-connections m consist of four separate lengths of pipe, arrangedin as many turns. This special construction is rendered necessary in order to avoid any straining of parts by expansion from the steam heat. The annular passage k is connected with the steam-headf in a similar manner by connections m. Steam entering the head j'from the inlet-pipe it thus has free circulation through both the central system, 9, and outer system, I, of pipes, and has a common exit from such pipes through outlet-pipe It.

To provide for the discharge of condensed steam which generally collects in the lower annular passage, 70, I have provided such passage with a series of diaphragms, a, one of which is clearly shown in Fig. 2 by breaking away the wall of the passage, and thelocation of the others being shown by dotted lines. As will be seen, these diaphragms n (which divide the annular passage k into a number of independent sections) are each locatedjust in the rear of the curved pipe-eonnections m, considering that the cylinder a is moved in the direction of the arrow in Fig. 2. In operation, these diaphragms lift the water deposited in each of the sections of the annular passage k, so that it may be discharged into the head f' through the pipe-connection m, which is immediately in advance of the particular diaphragm which'may be lifting the water. Thus it will be seen in the operation of the drier that the condensed steam in the annular passage k is efl'ectively discharged into the head f by means of these pipe-connections m and their corresponding diaphragms, n, the rear (liaphragm of each section operating to lift the water in such section until it has been discharged into the head f through the connection mjust in advance of such diaphragm.

The operation of drying the feed is briefly as follows: The cylinder and its contained apparatus (preferably inclosed to prevent waste of heat, and inclined as shown) is revolved, and during such revolution the feed to be dried is fed into its elevated end, where it is taken up and dropped alternately by the buckets c, the inclination of the cylinder gradually working such feed toward the lower end, where it is discharged in a thoroughly-dried condition, after having been thrown in contact with both systems 9 and l of steam-pipes during its transit through the revolving cylinder.

I am enabled by thisimproved construction to perform fully double the work previously done by the particular form of drier of which my invention is an improvement.

It is obvious that my improved form of drier is not confined in its application to feed alone, but is equally well adapted for drying other substances.

WhileI have herein shown my improved system of outer pipes and annular passages as connected and combined with the central system, and intend to claim such as an improvement thereon, it is obvious that such outer pipes and annular passages could be used alone in a cylinder substantially as shown, proper arrangements being made to deliver and discharge the steam therefrom.

I claim-- 1. In a fecddrier composed of an open inclined cylinder adapted to be revolved, and havinglongitudinal buckets upon its inner surface, a system of longitudinal steam-pipes placed between such buckets in close proximity to the inner surface of the cylinder, such steam-pipes being connected at their ends to annular steam -passages, substantially as shown and described. r

2. In a feed-drier composed of an open inclined' cylinder adapted to be revolved, and having longitudinal buckets upon its inner surface, the combination, with a system of longitudinal steam-pipes placed between such buckets in close proximity to the surface of the cylinder and the annular steam-passages connected'to the ends of such pipes, of the centrally-located steam-heads and their connecting-pipes, the steam-heads and annular passages being connected together in the manner substantially as shown and described.

3. The feed-drier consisting of the cylinder a, longitudinal buckets e, steam-headsff and their connecting steam-pipes g, the annular steam-passages It It" and their connecting steampipes I, located between the buckets e, and the connections at and m, all arranged and combined substantially as shown and described.

4. The feed-drier consisting of the cylinder at and its buckets c, the steam-heads ff and their connecting steam-pipes g, the annular steam-passages kk and their connecting steam pipes l, the annular passage It being provided with diaphragms n, for the purpose stated, and the connections at and m, between the steamheads and annular passages, all combined and operating substantially as shown and described.

In testimonywhereof I have signed my name to this specification in the presence of two subscribing witnesses.

- EDWIN BOAT.

Witnesses:

W. T. MILLER, O'rcro HonDIoK. 

